Methods of treating melanoma

ABSTRACT

The present disclosure is directed to methods of treating malignant melanoma by irradiating sites to which melanoma cells have become locally advanced, surgically undesirable, or have metastasized. In various embodiments of the invention, patients are treated with radiation doses in amounts ranging from about 25 to 230 cGy, preferably about 100 cGy to about 200 cGy, at least twice a day. The treatment regimen can be performed in the absence of additional treatments for the metastatic melanoma (e.g., chemotherapy/targeted therapy/immunotherapy) or in combination with additional therapies for chemotherapy/targeted therapy/immunotherapy. Various additional embodiments relate to the administration of between 20 and 100 fractions of radiation, preferably between 20 and 56 fractions of radiation.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.15/864,178, filed Jan. 8, 2018, now U.S. Pat. No. 10,426,972, which is adivisional of U.S. application Ser. No. 15/473,902, filed Mar. 30, 2017,now U.S. Pat. No. 9,861,833.

BACKGROUND OF THE INVENTION

Skin cancer is the most common form of cancer in the U.S., with morethan 3.5 million skin cancers diagnosed annually. There are three majortypes of skin cancer: (1) basal cell carcinoma; (2) squamous cellcarcinoma; and (3) melanoma. Of these three forms of skin cancer,melanoma is the deadliest form of the disease.

Basal cell carcinoma is the most common type of skin cancer in humans.These cancers tend to grow slowly and rarely spread to nearby lymphnodes or to distant parts of the body (see Worldwide Website:cancer.org). Treatment methods include simple excision, radiationtherapy, and chemotherapy, among others (see Worldwide Website:cancer.org).

Squamous cell carcinoma grows and spreads more than basal cell cancers.This cancer is more likely to invade fatty tissues just beneath the skinand is more likely to spread to lymph nodes and/or distant parts of thebody, although this is still uncommon (see Worldwide Website:cancer.org). Treatment methods include excision, radiation therapy,systemic chemotherapy, and lymph node dissection (see Worldwide Website:cancer.org).

Malignant melanoma is a highly aggressive, chemo-resistant,radio-resistant and lethal malignant neoplasm which is responsible for60-80% mortality among all skin cancers, with a 5 year survival rate of14%. 2% of the population will be diagnosed with this malignancy, andwell over 10,000 will die this year in the United States alone frommetastatic melanoma. After melanoma has been diagnosed, there are fivestandard types of treatment used: surgery, chemotherapy, biologictherapy, targeted therapy, and radiation therapy. Surgical excisions arean early treatment method utilized for patients with thin, non-invasivelesions; excisional biopsies are conducted for easy histologicalevaluation and assessing excision margins of the remaining tumor.Melanoma has a high potential for systemic metastasis.

Historical Approach to Radiation Delivery

The historical precedent for delivering radiation therapy is to delivertreatment once daily; however, the application of twice-daily radiationtherapy began over 40 years ago and was applied to the treatment of headand neck malignancies. Squamous cell carcinomas of the head and neckregion respond well to radiation. It was believed that if thedose-per-fraction of radiation was reduced and the delivery of treatmentoccurred twice-daily rather than once, such an approach may providetherapeutic advantage. The theory is based upon the sigmoid-responsecurve and is well known in radiobiology. An improvement inlocal/regional control for head and neck cancers was provided in severalstudies. At the same time, less morbidity was experienced to a patient'suninvolved but exposed tissue. Despite the objective success, theutilization of twice-daily treatment for head and neck malignanciesseldom if ever occurs, and its application has not been expanded toother malignancies. Factors cited for the discontinuation of twice-dailytreatment include inconvenience to patients.

A program of using twice-daily radiation for advanced ovarian carcinomaswas used in the mid-1980's. Ovarian malignant cells were known torespond favorably to radiation. However, the change in dose administeredper fraction was lowered, the emphasis being to safely protect a vastregion of “at risk/exposed” normal tissue. The overall results provedbeneficial, as length of survival was extended for these patients.Chemotherapy, as it evolved, replaced this approach, due to the natureof how ovarian cancer spreads.

Twice-daily radiation therapy was used in 1985 for advanced brainmalignancies, which were also known to respond to radiation. Althoughimprovement in survival occurs with radiation, the issue with thismalignancy is one of local failure rather than spread. This sets theinitial application for twice-daily treatment to provide increasedlocal/regional control and decreased side effects to normal tissue formalignancies that characteristically are not blood-borne, but ratherspread by direct or lymphatic extension. Theories attribute theseresults to either a genetic or metabolic effect of ionizing radiation.The benefit is only seen as a local response, and is based upon theassumption that increasing the total dose administered results in anincrease in local control for those malignancies known to be sensitiveto radiation.

This assumption is applied to both the principles of radiation deliveryand the use of chemotherapy/immunotherapy. Current understanding of amalignant cell's response applies similarly for the use of eitheronce-daily or twice-daily treatment for the above-mentioned cancertypes. Although previously used for some solid lung malignancies shownto have a positive response to radiation and whose tolerance of normaltissue is lacking, the examples cited above are furnished to establishand emphasize the safety of this treatment approach to normal tissue.Safety to normal tissue has been the basis for its very rare andincidental use in the past. The vast majority of radiation oncologistsand virtually none of the more recently-trained oncologists have everused a twice-daily treatment technique.

However, one specific malignancy, i.e. malignant melanoma, is known tobe “radiation resistant” when the treatment involves the standard dosesused for once-daily administration. The lack of clinical benefit hasbeen documented in the medical literature for more than half a century.During 1980s, it was understood that, albeit for microscopicpostoperative disease, radiation was an ineffective treatment formalignant melanoma because, as research substantiated, radiation did notprovide any level of tumor control. This belief has been promulgated andfixed in the medical literature. Repeated to every resident in theirtraining, radiation is ineffective for this particular malignancy.Radiation is seldom listed in any protocol, publication or by anynational melanoma association as a treatment option and has not in therecent past been mentioned in the National Comprehensive Cancer Network(NCCN) guidelines. An upcoming academic melanoma and cutaneousmalignancy conference is to be held in New York City on Mar. 24-25,2017. Of 22 university speakers, none are radiation oncologists, andthere are no presentations for radiation therapy in the treatment formelanomas. The unalterable medical assumption would be its lack ofeffectiveness with any single-daily dose schedule, since that deliveryhas proved to be ineffective.

The more recent approach toward the treatment of this malignancy, inparticular for its regional spread/involvement, is to increase theamount of energy given with the once-daily dose per fraction ofradiation, but administer treatment in fewer fractions (ahypofractionated regimen). This has appeared to result in slightlyincreased local/regional control within the treated area of themalignancy. However, no study has shown any improvement in long-termsurvival with such an approach. The most recent utilization of eithertargeted or immunotherapy combined with high dose-per-fraction radiation(hypofractionation) has resulted in improved but incompletelocal/regional control, with slight improvement for overall time ofsurvival. However, the morbidity to normal tissue with such an approachis significant, as illustrated by the radiobiologic sigmoid-responsecurve, and severely limits its practical application. The intensity ofside effects can prove fatal. There becomes a trade off as to whetherthis recent treatment plan's effectiveness, albeit incomplete inresponse and not curative, is offset by the resultant loss of quality oflife. However, it is the only approach presently known, utilized, andviewed as a viable alternative.

Further, if the use of standard once-daily treatment has beendiscredited over half a century, the idea of “weaker doses” administeredwith each treatment would defy any logic for using twice-dailyradiation. Specifically, if once-daily treatment is ineffective, asextensively documented, the assumption is logical that this particularmalignancy has proven to be radiation “resistant,” and must requirelarge doses at each once-daily administration. Lower dose in twice-dailyor multi-daily radiation were never considered and, indeed, would beformally rejected.

In essence, with the universal opposition to a standard radiationfractionation for the treatment of this particular malignancy, thesteady push has been to escalate the dose for each treatment,administered once-daily, completed in very few treatment fractions.Further, documentation in the medical literature cannot be found thatrefers to twice-daily administration for malignant melanoma.

A Local/Regional Response

The spread of head and neck malignancies is almost never blood-borne andis rather by direct extension or by lymphatic spread. The response seenwith head and neck malignancies is more of a metabolic response totreatment rather than immunologic and this response differs markedlyfrom the protocol described in the instant invention. The previousemphasis of using twice-daily treatment is to increase local/regionalcontrol of head and neck cancer, while reducing damage to normal tissue.The effect is limited to the area of treatment, because that is the onlyregion addressed with radiation as a focused approach.

Similar doses of radiation therapy applied to malignant melanoma,historically administered once daily at 180 cGy to 230 cGy per fraction,resulted in minimal local/regional control. Thus, its clinicalapplication in the past has only been used for that of microscopicresidual malignant melanoma disease, normally following a surgicalresection of the primary cancer. Radiation has not been used effectivelyfor metastatic disease other than with hypo-fractionated regimensreferred to previously, where doses in excess of 300 cGy (routinely 500cGy to 1,000 cGy, i.e. 950 cGy times 3 fractions over seven days or2,000 cGy delivered in one fraction) are administered once-daily. Dosesof radiation in this range result in increased morbidity (the greaterthe dose with each administration, the greater the morbidity to normaltissue). Delivered without immunotherapy, these doses provide nodifference in long-term survival, and with immunotherapy, they provide aslight improvement in long-term survival.

A Total Body Immune Response

There is no obvious part of the immune system that is activated by thetreatment of those malignancies whose spread pattern is by either directextension or lymphatic in nature, possibly due to the low presence ofdendritic cells. Twice-daily treatment was rarely, if ever, attempted inthe past to reduce collateral damage and protect vital body organs. Thesophistication of recent computerized (and expensive) treatmenttechnology similarly reduces dosage to uninvolved tissue by usingcomplex, multi-beam design for radiation delivery, essentiallyminimizing adverse impact by spreading exposure over a dispersed area.Although the impact to normal tissue may be similar with eitherapproach, more complex technology encourages shorter courses to beadministered, eliminating any remaining role for twice-daily treatment.Advanced technology moves in the direction of reducing the number oftreatments, each delivered in larger amounts, because its delivery canspare adverse effects to normal tissue. This is well documented in themedical literature. Further, if a patient faces short-term survival,even exceeding normal tissue tolerance is justified because the normalorgans would not exist to experience long term morbidity, thus furtherdiverging the application of radiation toward a limited number oftreatments.

By adhering to the disclosed radiation protocol, treatment of malignantmelanoma can be effectively delivered at approximately 5% of the presentannual health care cost compared to pharmaceutical agents. Also, unlikepresent pharmaceutical agents, markedly increased local/regional controland a potential cure can be achieved. The drug regimens presentlyavailable are up to 200 times more expensive for a year's interventionand require frequent hospitalizations for adverse drug-induced sideeffects, are temporary as to benefit, and every patient to dateeventually progresses with disease.

One of the most utilized immunotherapeutic drugs, Keytruda, isrecommended at a dose of up to 10 mg/kg. Based upon the averagepatient's size, the present cost for Keytruda is as much as $83,000monthly. The drug would, unless stopped due to toxicity, be routinelycontinued until progression of disease occurs. If that time frame is 12months, the cost may be greater than $1 million per patient, excludingthe required hospitalizations for untoward sequelae.

A recent study to treat metastatic malignant melanoma (Keynote 029)utilized a combination of a PDL-1 antibody in the form of Yervoy andCytotoxic T-lymphocyte associated antigen-4 antibody in the form ofKeytruda. The results were reported at the recent annual ASCO meeting.Toxicity is graded from I to IV. I is mildest, and requires nointerruption in the administration of treatment. Grade II is moderate,and requires a temporary interruption in treatment administration.Grades III and IV are severe and life-threatening respectively, and,according to national guidelines, require the termination of the drugfrom further use.

FIG. 1 provides a slide presented at the ASCO Annual Meeting 2016 by Dr.G. V. Long, Keynote 029: AE. As FIG. 1 indicates, Grade III and IVtoxicity occurred in 67% of patients when treatment related and immunerelated adverse events are combined. In essence ⅔ of patientsexperienced severe and life-threating toxicity from combination drugtherapy. As the table above indicates, discontinuation of either or bothdrugs involved 46% of patients.

This compares to, at most, Grade I toxicity with radiation, administeredtwice daily depending on multiple factors, including the area of thebody treated and the extent of the radiation-induced immune-relatedeffect (normally symptoms of the flu). In essence, toxicity fromradiation is rare. When one factors in potential hospitalization forGrade III and IV toxicity, the cost resulting from pharmaceuticalimmunotherapy to include financial, physical, and emotional can bedevastating. This makes radiation treatment a more cost effective whendelivered in a twice daily protocol and a far more physiologicallytolerable treatment regimen for malignant melanoma. Accordingly, thedisclosed invention seeks to provide treatment of malignant melanoma ina more cost effective way and with significantly lower incidence ofadverse physiological and psychological events.

BRIEF SUMMARY OF THE INVENTION

The invention provides a method for treating malignant melanomacomprising the use of radiation therapy in which a dose of about 25 toabout 230 centiGray (cGy), preferably about 100 to about 200 cGy, ofradiation is delivered to a site of locally advanced or metastasizedmalignant melanoma. Radiation therapy is administered at least twice perday to the subject.

BRIEF DESCRIPTION OF THE DRAWINGS

The patent or application file contains at least one drawing executed incolor. Copies of this patent or patent application publication, withcolor drawing(s), will be provided by the Office upon request andpayment of the necessary fee.

FIG. 1 provides a slide presented at the ASCO Annual Meeting 2016 by Dr.G. V. Long, Keynote 029: AE.

FIG. 2 shows an MRI of the brain.

FIG. 3 shows a patient resuming normal activity.

FIG. 4 shows a repeat MRI of the patient of FIGS. 1 and 2 (the patientof Example 1).

FIG. 5. Symptoms of respiratory distress led to a CT scan demonstratinga 5×6 cm right suprahilar/paramediastinal mass, with deviation of thetrachea and ascending aorta as well as subcarinal adenopathy.

FIG. 6 shows inflammatory changes due to treatment.

FIG. 7. The final images demonstrate response to treatment of thepatient of FIGS. 5 and 6 (the patient of Example 2).

FIGS. 8, 9, 10 and 11 represent the disease at the time of presentationfor the patient of Example 3.

FIG. 12 compares the pre- and post-treatment appearance of the rightmedial thigh 4.7×4.0 cm lesion for the patient of Example 3.

FIGS. 13 and 14 demonstrate complete visible resolution of the priormelanoma of the leg for the patient of Example 3.

FIGS. 15 and 16 represent serial PET/CT scans, including the original aswell as follow-up scans, for the patient of Example 4.

FIG. 17 compares serial PET/CT scans demonstrating continued regressionof bulky pulmonary parenchymal disease, with volume comparisons, for thepatient of Example 5.

FIGS. 18-37 illustrate disease progression for the patient of Example 6,including the appearance at the time of initial evaluation.

FIGS. 38-46 relate to the effects of treatment for the patient ofExample 7.

FIGS. 47-54 relate to the effects of treatment for the patient ofExample 8.

FIG. 55 shows a variance of dose per fraction regimens for patientstreated with locally advanced disease, as well as macroscopic metastaticdisease compared to survival over time.

FIG. 56 shows total dose versus dose per fraction given twice-daily forlocally advanced disease, as well as macroscopic metastatic disease.

FIGS. 57 and 58 illustrate post-operative microscopic disease over time.

FIGS. 59-63 are serial “slices” comparing the original mass (left) withthe post-treatment response (right) for the patient of Example 3.

DETAILED DESCRIPTION OF THE INVENTION

As used herein, the singular forms “a”, “an” and “the” are intended toinclude the plural forms as well, unless the context clearly indicatesotherwise. Furthermore, to the extent that the terms “including”,“includes”, “having”, “has”, “with”, or variants thereof are used ineither the detailed description and/or the claims, such terms areintended to be inclusive in a manner similar to the term “comprising”.The transitional terms/phrases (and any grammatical variations thereof)“comprising”, “comprises”, “comprise”, “consisting essentially of”,“consists essentially of”, “consisting” and “consists” can be usedinterchangeably.

The term “about” or “approximately” means within an acceptable errorrange of 0-20%, 0 to 10%, 0 to 5%, or up to 1% of a given value. Whereparticular values are described in the application and claims, the terms“about” or “approximately” are used and provide for a variation of 0-10%around the value (X±10%). In the present disclosure, ranges are statedin shorthand, so as to avoid having to set out at length and describeeach and every value within the range. Any appropriate value within therange can be selected, where appropriate, as the upper value, lowervalue, or the terminus of the range. For example, a range of 0.1-1.0represents the terminal values of 0.1 and 1.0, as well as theintermediate values of 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, and allintermediate ranges encompassed within 0.1-1.0, such as 0.2-0.5,0.2-0.8, 0.7-1.0, etc. Values having at least two significant digitswithin a range are envisioned; for example, a range of 5-10 indicatesall the values between 5.0 and 10.0 as well as between 5.00 and 10.00,including the terminal values.

“Treatment”, “treating”, “palliating” and “ameliorating” (andgrammatical variants of these terms), as used herein, are usedinterchangeably. These terms refer to an approach for obtainingbeneficial or desired results including, but not limited to, therapeuticbenefit. A therapeutic benefit is achieved with the eradication oramelioration of one or more of the physiological symptoms associatedwith the underlying disorder, such that an improvement is observed inthe patient, notwithstanding that the patient may still be afflictedwith the underlying disorder.

The term “effective amount” or “therapeutically effective amount” refersto that amount of a radiation, as described herein, that is sufficientto effect a therapeutic benefit to a subject. The therapeuticallyeffective amount may vary depending upon the intended subject anddisease condition with respect to treating malignant melanoma, e.g., theweight and age of the subject, the severity of disease, the manner ofadministration and the like, which can readily be determined by one ofordinary skill in the art.

The term “subject” refers to an animal, such as a mammal, for example ahuman. The methods described herein can be useful in both humans andnon-human animals. In some embodiments, the subject is a mammal (such asan animal model of disease), and in some embodiments, the subject ishuman. The terms “subject” and “patient” can be used interchangeably.

The term “centiGray (cGy)” as used herein refers to a derived metric(SI) measurement unit of absorbed radiation dose of ionizing radiation,e.g. x-rays. The SI prefix centi stands for one hundredths. ThecentiGray is equal to one hundredth of a gray (0.01 Gy), and the gray isdefined as the absorption of one joule of ionizing radiation by onekilogram (1 J/kg) of matter, e.g., human tissue.

Thus, the described invention provides methods for treating a locallyadvanced, surgically undesirable, or metastatic malignant melanoma in asubject administering radiation therapy in a dose (fraction) of about25-230 centiGray (cGy), preferably about 100-200 centiGray (cGy), at asite to which melanoma has locally invaded or metastasized. Radiationtherapy is provided to the subject with radiation being administeredover at least two doses (fractions) per day. For example, fractions ofradiation therapy can be administered from two (2) to ten (10) times perday with an interval of at least about one hour between fractions ofradiation. In such a situation, between 2 and 11 fractions of radiationcan be administered to a subject per day. Typically, between 2 and 6fractions of radiation are administered to a subject each day. Incertain preferred embodiments, two (2) fractions of radiation areadministered to a subject per day. In certain aspects of the invention,a total of between with a total of between 20 and 100 fractions ofradiation can be administered to a subject. Some embodiments contemplatetreating a subject with a total of between 20 and 56 fractions ofradiation.

As would be apparent to those skilled in the art, the interval betweenfractions is dependent upon the number of fractions of radiation beingadministered to a subject each day. Thus where two fractions ofradiation in doses of about 100-200 cGy are administered, one can havean interval of between about 1 hour and, maximally, about 23 hours.However, typical intervals between radiation fractions are between about2 hours and about 10 hours, more preferably between about 2 hours andabout 8 hours or between about 2 hours and about 6 hours.

Certain embodiments of the invention provide a twice-daily approach forthe treatment of locally advanced/regional/metastatic malignantmelanoma. This approach causes a biologically different andunpredictable response from the cancer cells. The dose-per-fractionregimen and its schedule of delivery specified herein, withdocumentation for twice-daily treatment, change both the understandingof what takes place and what the required total dose really is asapplied to malignant melanoma. The biologic sensitivity of a malignantmelanoma cell with this different and previously unrealized approach issomehow modified, requiring less of a total dose to be administered,while at the same time achieving a marked increase in local/regionalcontrol. In essence, local/regional control of disease has exceeded 95%.Locally invasive and/or regional disease of any mass size responds withcomplete disappearance in many patients. This now provides an increasedtime for survival well beyond what is presently offered and with apreviously unseen potential for cure. The invention reveals beneficialresults beyond the treatment of local/regional spread to includeregression of untreated distant metastatic malignant melanoma affectingorgans/tissue, as documented both clinically and radiographically,without the use of any pharmaceutical agent.

The described invention contemplates the treatment of malignant melanomapatients using the disclosed radiation therapy either alone or incombination with other treatments for malignant melanoma. Non-limitingexamples of such added treatments include surgery (e.g., wide excisionsurgery), chemotherapy (e.g., treatment with vemurafenib, dabrafenib,trametinib, cobimetinib, temozolomide, dacarbazine, paclitaxel, etc.) orimmunotherapy (e.g., pembrolizumab, ipilmumab, nivolumab, interfereonalpha, interferon alpha 2b).

The following are guidelines for administering the radiation therapyaccording to the invention described herein. The dose per fraction to bedelivered includes a dose range from 25 cGy per-fraction to 230 cGyper-fraction, delivered up to seven times daily, for the treatment oflocal, regional, or metastatic malignant melanoma. The total doseadministered for the entire course of treatment to a certain area of thebody will vary and is to be defined by the amount of radiation deliveredwith each fraction, the number of fractions (two or more) delivereddaily, as well as the volume of tissue exposed to treatment. Total doserecommendations can be adjusted as needed. The larger the volumerequiring treatment, the less dose of radiation per fraction that cansafely be administered. For example, higher doses of radiationadministered with each fraction require less of a total dose. However,these doses are carefully adjusted based upon the normal tissue exposedto radiation. This varies dramatically from one area/organ of the bodyto another and doses are adjusted based upon the nature of that specificorgan structure(s) exposed as well as the volume of tissue exposed toradiation, ultimately leading to the total dose received. As a result,this approach dramatically reduces side effects to normal tissue bothduring treatment and, more importantly, long-term. The range of idealdosing and scheduling of its delivery is provided herein and can bemodified on a case by case basis within the realm of the guidelinesprovided herein.

The radiation guidelines presented herein cause devastating effect onmalignant melanoma and also provide secondary protective effect onnormal tissue. The fact that the elimination of malignant melanomaoccurs under this design, while still very much considering thetolerance of the surrounding organ tissue, raises variables essential toits success. These variables include the dramatic local/regionalcontrol, unexplained in the conventional understanding, as well as apotential total body immune response without the aid of drugs. Theinvention establishes an untapped uniqueness of treatment design whichhas never been realized for this particular malignancy.

The application also provides the following non-limiting embodiments:

1. A method for treating malignant melanoma in a subject comprisingirradiating malignant melanoma within the subject with at least twofractions of radiation per day, said fractions of radiation beingbetween about 25 to about 230 centiGray (cGy), preferably about 100 toabout 200 centiGray (cGy), and said fractions being separated by a timeinterval of at least about 0.5 hour.

2. The method according to embodiment 1, wherein the fractions ofradiation are separated by a time interval ranging from about 1 hourand, maximally, about 23 hours.

3. The method according to embodiment 1, wherein the fractions ofradiation are separated by a time interval ranging from about 1 hoursand about 8 hours.

4. The method according to embodiment 1, wherein the fractions ofradiation are separated by a time interval ranging from about 2 hoursand about 8 hours.

5. The method according to embodiment 1, wherein the fractions ofradiation are separated by a time interval ranging from about 1 hoursand about 6 hours.

6. The method according to any one of embodiments 1-5, said methodcomprising treating said subject with radiation and a therapy comprisingsurgery, chemotherapy, immunotherapy or a combination of said therapies.

7. The method according to embodiment 6, wherein saidchemotherapy/targeted therapy/immunotherapy is selected from treatmentwith vemurafenib, dabrafenib, trametinib, cobimetinib, temozolomide,dacarbazine, paclitaxel or combinations thereof.

8. The method according to embodiment 6, wherein saidchemotherapy/targeted therapy/immunotherapy is selected from treatmentwith pembrolizumab, ipilmumab, nivolumab, interfereon alpha, interferonalpha 2b or combinations thereof.

9. The method according to any one of embodiments 1-5, wherein saidsubject is treated with a total of between 20 and 100 fractions ofradiation.

10. The method according to embodiment 9, wherein said subject istreated with a total of between 20 and 56 fractions of radiation.

11. The method according to embodiment 6, wherein said subject istreated with a total of between 20 and 100 fractions of radiation.

12. The method according to embodiment 11, wherein said subject istreated with a total of between 20 and 56 fractions of radiation.

13. The method according to embodiment 7, wherein said subject istreated with a total of between 20 and 100 fractions of radiation.

14. The method according to embodiment 13, wherein said subject istreated with a total of between 20 and 56 fractions of radiation.

15. The method according to embodiment 8, wherein said subject istreated with a total of between 20 and 100 fractions of radiation.

16. The method according to embodiment 15, wherein said subject istreated with a total of between 20 and 56 fractions of radiation.

Materials and Methods

Not limited to the type of equipment or type of energy used, i.e.,whether it be photon, electron, orthovoltage, or proton beam. Notlimited to the design of treatment, i.e., simple appositional, parallelopposed, multi-field conventional, IMRT, or other forms of design. Thetype of equipment and design of the treatment represents the state oftechnology. There will be no change in these factors.

All patents, patent applications, provisional applications, andpublications referred to or cited herein are incorporated by referencein their entirety, including all figures and tables, to the extent theyare not inconsistent with the explicit teachings of this specification.

Following are examples which illustrate procedures for practicing theinvention. These examples should not be construed as limiting. Allpercentages are by weight and all solvent mixture proportions are byvolume unless otherwise noted.

The following examples are put forth so as to provide those of ordinaryskill in the art with a complete disclosure and description of how tomake and use the present invention, and are not intended to limit thescope of what the inventors regard as their invention, nor are theyintended to represent that the experiments below are all or the onlyexperiments performed.

Efforts have been made to ensure accuracy with respect to numbers used(e.g., amounts, temperature, etc.) but some experimental errors anddeviations should be accounted for. Unless indicated otherwise, partsare parts by weight, molecular weight is weight average molecularweight, temperature is in degrees Centigrade, and pressure is at or nearatmospheric.

Example One

An MRI of the brain was performed (FIG. 2) for this symptomaticgentleman with a history of confirmed malignant melanoma. The studydemonstrated a 3.7×3.6×3.0 cm enhancing mass lesion in the left frontallobe of the brain, with surrounding swelling. There was a shift of themidline structures to the contralateral right side. Symptoms of nauseaand vomiting forced the patient to remain immobile. He was found not tobe a surgical candidate. 6 MV photon radiation was administered forabout one month, delivering 5940 cGy at 135 cGy per fraction,twice-daily. No systemic intervention was ever administered. (FIG. 3)The patient was subsequently able to resume normal activity, such ashorseback riding, within three to four months after treatment.

A repeat MRI (FIG. 4) demonstrated a residual 1.0 cm calcification withslight surrounding edema. There was no activity following theadministration of gadolinium, indicating there was no cancer evident onthis study. He remained asymptomatic thereafter.

Example Two

A 68-year-old gentleman presented with a 1.6 mm Clark level IV malignantmelanoma involving the skin of the right back. The Moffitt Cancer Centerin Tampa, Fla. performed intra-operative lymphatic mapping, sentinelnode biopsy of the right axilla, radical wide local excision, and flapadvancement, with four negative sentinel nodes.

Symptoms of respiratory distress led to a CT scan demonstrating a 5×6 cmright suprahilar/paramediastinal mass, with deviation of the trachea andascending aorta as well as subcarinal adenopathy. A PET/CT demonstrateda “massive” hypermetabolic mass within the mid-chest with highlyelevated metabolic activity of 22 units, involving the paratracheal,hilar, and subcarinal space (FIG. 5).

Endoscopy evidenced impending obstruction. Biopsies were consistent withmetastatic malignant melanoma. Definitive radiation was administered tothe chest over the span of about one month and was delivered at 135 cGyper fraction twice-daily utilizing conventional photon therapy. Thetotal dose to the lung was 5670 cGy. The first PET/CT scan following thecompletion of radiation therapy demonstrated significant inflammatorychanges consistent with treatment intervention (FIG. 6). The finalimages demonstrate the dramatic response to treatment (FIG. 7).

The region in the superior chest demonstrating activity did not undergoradiation. This approach was requested by the medical oncology staff atthe Moffitt Cancer Center that this area not be treated so that any formof systemic therapy delivered later would provide a marker to judgeresponse. Because of the dramatic results achieved following radiation,the patient refused any form of systemic (targeted/immunotherapeutic)intervention, and the remaining area was subsequently addressedsuccessfully with radiation.

Example Three

An 83 year old noticed an ulcerative lesion involving the skin of herright ankle. She developed cellulitis and was placed on severalantibiotics. “Red spots” involving the right ankle increased in sizewith biopsy showing melanoma with a thickness of 1.8 mm, Level IV.

The patient was initially evaluated at the University of Florida, andreferred to the Moffitt Cancer Center. Yervoy could not be used due tothe patient's renal status. Although Keytruda was considered, itssystemic side effect profile negated that treatment option from herconsideration; thus, the patient received no targeted/immunotherapeuticintervention. FIGS. 8, 9, 10 and 11 represent the disease at the time ofpresentation.

A PET/CT demonstrated soft tissue thickening with subcutaneous edemaoverlying the posterior lateral right ankle with numerous FDG avid softtissue nodules in the right lower extremity to the level of the proximalfemoral artery, demonstrating SUVs of 7.3. This study, performed at theUniversity of Florida, was with the following report: “A bulky softtissue FDG avid mass centered in the proximal anterior compartment ofthe right thigh adjacent to the femoral vessels measuring 4.0×4.7 cm ingreatest axial dimension and demonstrating an SUV of 7.3, encases theright femoral artery.” She was diagnosed with Stage IIIC malignantmelanoma.

The surgical oncology department at the Moffitt Cancer Centerrecommended a radical lymphadenectomy of the entire right lowerextremity, extending into the groin. The patient refused surgicalintervention. The patient was seen and physical examination revealedelephantiasis of the right lower extremity, with 3+ pitting edema fromthe toes proximally. Multiple cutaneous nodules could be visibly andpalpably appreciated to the level of the groin. Individual adenopathy togreater than 4.0 cm in size was found along the medial aspect of theright thigh, corresponding to the PET/CT scan findings.

The patient received twice daily radiation to multiple areas of theright lower extremity and pelvis, with total doses ranging from 3645cGy, 5130 cGy, and 5265 cGy, administered at rates of 115-135 cGy perfraction.

A subsequent PET/CT revealed complete resolution with normal PETimaging. Physical examination revealed no visible evidence of the priormalignancy. The right leg returned to normal size, and was equal withthe left leg. FIG. 12 compares the pre- and post-treatment appearance ofthe right medial thigh 4.7×4.0 cm lesion. The remaining FIGS. 13 and 14demonstrate complete visible resolution of the prior melanoma of theleg.

Example Four

A 61-year-old former pharmaceutical representative was found to have alesion involving the skin of the lower back at the level of L4. Biopsyrevealed malignant melanoma in situ, with complete surgical excision.Two weeks prior to our evaluation, a “golf ball” size right axillarymass was found. Mammography and ultrasound demonstrated an abnormallyenlarged lymph node measuring 2.7 cm, confirmed on PET/CT, whoseactivity was markedly elevated with an SUV of 15.2 units. Biopsy-onlyproved metastatic malignant melanoma.

Physical examination revealed a firm 2.7 cm mass tethered to theunderlying axillary structures. Definitive radiation treatment wasadministered over the span of about two months. The patient received atotal of 6480 cGy, delivered at 135 cGy per fraction twice-daily. He isnow 22 months from treatment, with both physical examination andradiographic studies demonstrating no evidence of local/regionalrecurrence and no metastatic disease. The patient did not receiveimmunotherapeutic intervention. FIGS. 15 and 16 represent serial PET/CTscans, including the original as well as follow-up scans.

Example Five

The first resection for this gentleman was for a melanoma lesioninvolving the skin of the right shoulder. A second lesion was resected anumber of years later and confirmed to be spindle cell melanoma. Biopsyof a third left chest lesion showed melanoma, widely excised withnegative margins.

The patient was followed at the Moffitt Cancer Center, as well asRoswell Park in Buffalo. Subsequently, a left posterior shoulder lesionproved his fourth primary melanoma and a CT scan revealed a tumor in theright chest invading the right bronchus intermedius. A PET/CT founddisease in the right lower lobe extending into, and inseparable from,the right hilum. The overall size of the mass measured 6.5×4.7×4.7 cm,and demonstrated a metabolic activity of 12 units. In addition, leftupper lobe parenchymal metastatic disease was found measuring1.7×1.7×1.0 cm. Bronchoscopy revealed spindle cell melanoma cytology.When evaluated at the Moffitt Cancer Center, 100% obstruction of theright bronchus intermedius was found, with the airway debulked.Pathology confirmed malignant melanoma.

Although systemic intervention was recommended, the potential sideeffects caused the patient to decline this modality and he elected toproceed with radiation. He therefore received 6480 cGy and 5940 cGy tothe right and left lung masses, respectively, at 135 cGy per fraction,delivered twice-daily over the span of about one month.

Treatment with radiation led to improved breathing, with O2s above 98%.The patient returned to Buffalo for the summer. Repeat CTs at RoswellPark demonstrated continued linear regression of disease, with nofurther treatment intervention due to the patient's continued responseto radiation. FIG. 17 compares serial PET/CT scans demonstratingcontinued regression of bulky pulmonary parenchymal disease, with volumecomparisons.

Example Six

An 83-year-old gentleman was originally diagnosed with malignantmelanoma in 1987, at which time he underwent a wide local excision for alesion involving his left shoulder. Over two decades later, he presentedwith further but unrelated disease behind both the left ear and aseparate left scalp nodule. Biopsy of the left mastoid area revealedmalignant melanoma with a Breslow thickness of 2.0 millimeters and aClark's level IV. Radical surgery with full thickness skin graft as wellas wide removal of the left scalp nodule was performed. Pathologymandated further resection. A recurrence again required resection.Another recurrence was tested and revealed BRAF V600E. After 9surgeries, he was begun on vemurafenib (Zelboraf), a targeted therapy,but experienced significant side effects. Reduction in dose did notresolve side effects, as the cancer's growth accelerated. Treatment wasdiscontinued and the patient was told there were no further treatmentoptions available.

Subsequently, he presented to me for evaluation and received radiationtherapy over a period of about one month for a total dose of 5940 cGy,delivered at 135 cGy/fraction. No systemic intervention wasadministered.

FIGS. 18 and 19 represent the appearance at the time of initialevaluation. FIG. 20 represents the appearance during the course oftreatment, with FIG. 21 representing the appearance on the finaltreatment day. FIG. 22 represents the appearance at the first follow-upvisit six weeks following the completion of treatment. The patient wasfollowed over time and FIGS. 23-37 demonstrate the results. FIG. 37 is acomparison of the first post treatment documentation with that of thelast follow-up visit. Close follow up has included physical examination(as documented in the accompanying photographs and serial PET/CT scans).The patient is without physical or radiographic evidence of recurrenceor evidence of metastatic disease. In addition, there were no posttreatment side effects from radiation. Repeat physical examinationsreveal excellent maintenance of the skin without scar tissue formation.There has been no deficit in the patient's taste, smell, or hearing.

Example Seven

A respected pediatrician underwent removal of a left shoulder skinmelanoma in. A left axillary 4 cm nodal conglomerate was found severalyears after resection, demonstrating extracapsular extension, withincomplete resection due to adherence to the chest wall.

An axillary dissection at the Moffitt Cancer Center revealed a positive1.2 cm node without extra-capsular extension; BRAF wild type was found.The patient received post-operative radiation to the area of priorsurgical resection for a period of about one month.

A follow-up PET/CT revealed a RUL 9-10 mm pulmonary nodule, with an SUVof 3.5, felt by Moffitt Cancer Center to be metastatic malignantmelanoma (FIG. 38).

The patient was treated for about one month at the site of the lunglesion with twice-daily radiation, delivered at 135 cGy per fraction to6210 cGy total dose.

A PET/CT (FIG. 39) demonstrated a decrease in both size and metabolicactivity; serial PET/CTs (FIGS. 40-46) were performed demonstratingfibrotic changes consistent with treatment, but no evidence ofrecurrence or metastatic disease.

Example Eight

A 60-year-old male was diagnosed with a malignant melanoma involving theleft shoulder. Melanoma occurred in the right temporal region severalyears later, with subsequent removal. This was followed by a resectionand lymph node dissection, performed at the Moffitt Cancer Center, withpathology from the resection specimen and nodes to be negative.

Subsequently, a PET/CT scan revealed a 2 cm right facial mass containedwithin the preauricular region; SUV was markedly elevated to 31.4 units(FIG. 47). At the same time, a hypermetabolic 5 mm right upper lobenodule was seen in the chest, demonstrating an SUV of 5 (FIG. 48). Thepatient was scheduled to undergo thoracotomy and resection of the rightlung lesion first, with evaluation of the right preauricular region tobe forthcoming thereafter. Testing demonstrated a BRAF wild typemelanoma.

The patient declined surgical intervention, and proceeded withdefinitive twice-daily radiation. Treatment was delivered over theperiod of about one month and was delivered using a combination ofphoton/electron therapy to the right face and proximal regional nodes;photon energy was delivered to the lesion within the lung. Treatment wasadministered at 135 cGy per fraction, administered twice-daily for atotal dose of 6460 cGy to both areas of involvement. The patient is now94 months since the initiation of treatment, without evidence ofrecurrence within either treatment volume. No diminishment in quality oflife has been observed. (FIGS. 49-54 document control of both sites ofdisease.)

The patient did develop further disease outside of the areas of originaltreatment, when resection of a right neck mass revealed metastaticmalignant melanoma. Four cycles of Yervoy were administered during thepatient's radiation therapy. A total of 5400 cGy was delivered at 135cGy per fraction, administered twice daily. The patient is now more than24 months from the out of field recurrence, without physical evidence oflocal/regional or further metastatic disease. In addition, the lastPET/CT scan was performed with “no clear evidence of metastatic disease.No definite significant abnormal FDG activity.”

Data

FIG. 55 utilizes a variance of dose per fraction regimens for patientstreated with locally advanced disease, as well as macroscopic metastaticdisease compared to survival over time. It is evident that the optimaldose per fraction is still not clearly defined. The biological effect,however, is well documented with 100% complete/continued regression. Onedeath has occurred from unrelated causes, with the remaining few deathsoccurring from disease progression outside the area of local/regionalcontrol. FIG. 55 illustrates complete/continued regression ofvisible/radiographic disease within treatment volume. Dose per fraction(treated twice a day) is also provided.

FIG. 56 compares total dose versus dose per fraction given twice-dailyfor locally advanced disease, as well as macroscopic metastatic disease.Again, although there is 100% complete/continued regression, the widevariance in total dose used still requires further elucidation todetermine its optimum range as to total dose (cGy), for locallyadvanced/macroscopic metastatic disease.

FIGS. 57 and 58 illustrate post-operative microscopic disease over time.These patients are included for totality, and document a 100%local/regional control. When one compares the standard once-dailyradiation therapy in the postoperative setting for microscopic disease,the medical literature would indicate one cannot achieve 100%local/regional control. Our data would indicate we have achieved thatgoal. FIG. 57 illustrates disease control using dose per fraction. FIG.58 illustrates the total dose delivered (in cGy).

Data Observations

As we review the data for twice-daily radiation therapy in this patientpopulation, striking contrasts surface when comparing the historicaltreatment of melanoma itself, as well as with non-melanoma malignancies.The range of doses utilized for this select twice-daily patient seriesextends from an initial 135 cGy per fraction to 100 cGy per fraction.The accompanying visual examples in this patient population demonstratethe sensitivity to twice-daily treatment for malignant melanoma that isdiametrically different compared to the same malignancy treatedonce-daily.

Just as importantly, one must now question the ideal total dose requiredto obtain optimum control of disease. Several factors are evident in ourdata. The first is that the total dose required to achievelocal/regional control has no comparison to cancers that are notmalignant melanoma. Thus one cannot use studies involving carcinomas orsarcomas to extrapolate their data, since the biologic response isdissimilar. It is evident that the sensitivity of malignant melanomacells goes from radio resistant at standard once-daily doses to markedsensitivity with twice-daily, potentially allowing a reduction in totaldose requirement. Respecting the historical tolerance of normal tissueprotects the patient as to the upper safe limit used, but we do not knowyet the lower limit; in essence, the patient avoids side effects, withmore safety beyond what is presently experienced.

Next, the sensitivity of malignant melanoma cells to twice-dailyradiation may also change the requirements for continuous delivery whencompared with other malignancies. In fact, interruption of greater thanfive weeks during treatment for a 94-year-old female did not initiallyaffect local control of her disease.

The last observation involves the time from the initiation of treatmentuntil there is disappearance of tumors when a second unrelated area ofdisease requires treatment. For example, if a new area of metastaticdisease (or a new area of involvement unrelated to the originalmalignancy) occurs following completion of a course of therapy, thereappears to be a much more rapid therapeutic response with furthertreatment. This observation speaks in favor of an immunotherapeuticcomponent to the elimination of disease. Rather than weeks/months,visible response is evident in a matter of days. This was the case forthe patient of Example #3, who recently developed a metastatic rightneck mass. Multiple daily “black out” episodes occurred, risking injurydue to extrinsic compression of the vasculature. Physical examinationrevealed a rock-hard mass in the right lower neck, firmly fixed to theunderlying muscle and bone. FIGS. 59-63 are serial “slices” comparingthe original mass (left) with the post-treatment response (right).Within three treatment days (6 fractions at 125 cGy per fraction), themass was reduced by 70%. By day 5, the mass was no longer physicallypalpable. Now evident on CT scans are only the normal structures of theneck. No immunotherapy was administered, and no further blackouts haveoccurred.

Certain aspects of the radiation therapy provided in this disclosureinclude a specific dose of radiation per-fraction administered at thetime of each treatment, a specific time interval for the actualtreatment delivery of two, and up to seven, treatments per day, and aspecific total dose of radiation delivered for the entire treatmentsequence. Each of these components has variable criteria based upon thesize and volume of disease, its location(s), the multiple nature of themalignant deposits to be safely treated, the tolerance of tissue withinthose locations, the biologic effect of how twice/multiple-dailyradiation affects malignant melanoma cells and the total dose ofradiation to be administered.

The treatment regimen provided in these examples provide severalbeneficial results, for example: A) a seismic response in regressionand/or disappearance of the treated tumor mass(es), B) ultimatelocal/regional control of malignant melanoma, C) markedly increasedpatient survival, D) an immuno-therapeutic component for the treatment'ssuccess without the use of pharmaceutical agents. These benefitsultimately offer a statistical cure which has never been documented forthis uniformly fatal malignancy while protecting uninvolved normal butexposed tissue/organs.

Without being bound to theory, it is believed that the radiationprotocols described herein provide a dramatic change in the body'simmune response. Specifically, the occurrence of metastatic disease hasbeen altered and reduced. With this treatment regimen, the body's ownimmune response is activated. The structure of these immune compoundscreated by this treatment schedule are undefined as of yet, however,must be produced by the human body itself. Thus, the evolution of thesechemicals and/or compounds, produced as a result of the uniqueness ofthis radiation delivery schedule, occurs in, and is regulated by, thepatient's body. The exactness of the production of these chemicalsand/or compounds is specific to each genetic tumor profile locatedwithin a specific patient.

The present medical literature would indicate a complete response fromimmunotherapeutic drugs to be, at best, 4-13%, with the higher numbercorresponding to those malignancies with a BRAF mutation. Oddly, 13% ofpatients in the immunotherapeutic drug studies withdrew because ofunacceptable adverse side effects. In contrast, for radiation, 95%complete response within the treated region is obtained. In addition, noone who received the twice-daily radiation regimen discontinuedtreatment because of side effects.

With immunotherapeutic drugs, 50% of patients demonstrate progression ofdisease by six months, with most patients progressing with disease by 14months. In essence, immunotherapy offers a temporary “standoff” and nopotential for cure from disease. With the protocol described herein forradiation delivery, the majority of patients document no signs ofprogression of disease and are potentially cured. As the exact dosingschedule continues to constantly evolve, the patients treated accordingto the protocols described herein extend for greater than two decadesfollowing treatment, with many patients demonstrating no evidence offurther disease. Again, those who do demonstrate further disease canstill be treated, since no resistance has developed, as routinely occurswith pharmaceutical agents.

It should be understood that the examples and embodiments describedherein are for illustrative purposes only and that various modificationsor changes in light thereof will be suggested to persons skilled in theart and are to be included within the spirit and purview of thisapplication and the scope of the appended claims. In addition, anyelements or limitations of any invention or embodiment thereof disclosedherein can be combined with any and/or all other elements or limitations(individually or in any combination) or any other invention orembodiment thereof disclosed herein, and all such combinations arecontemplated within the scope of the invention without limitationthereto.

I claim:
 1. A method for treating cutaneous malignant melanoma in asubject comprising irradiating cutaneous malignant melanoma on the skinof the subject with at least two fractions of radiation per day, saidfractions of radiation being between about 100 to about 200 centiGray(cGy) and said fractions being separated by a time interval of at leastabout 0.5 hour.
 2. The method according to claim 1, said methodcomprising irradiating said cutaneous malignant melanoma on the skin ofthe subject with at least two fractions of radiation per day, saidfractions of radiation being between about 100 to about 135 centiGray(cGy) and said fractions being separated by a time interval of at leastabout 0.5 hour.
 3. The method according to claim 1, said methodcomprising irradiating cutaneous malignant melanoma on the skin of thesubject with at least two fractions of radiation per day, said fractionsof radiation being between about 100 to about 160 centiGray (cGy) andsaid fractions being separated by a time interval of at least about 0.5hour.
 4. The method according to claim 1, wherein the fractions ofradiation are separated by a time interval ranging between about 1 hourand, maximally, about 23 hours.
 5. The method according to claim 1,wherein the fractions of radiation are separated by a time intervalranging between about 1 hour and about 8 hours.
 6. The method accordingto claim 1, wherein the fractions of radiation are separated by a timeinterval ranging between about 2 hours and about 8 hours.
 7. The methodaccording to claim 1, wherein the fractions of radiation are separatedby a time interval ranging between about 1 hour and about 6 hours. 8.The method according to claim 1, said method comprising treating saidsubject with radiation and a therapy comprising surgery, chemotherapy,targeted immunotherapy, immunotherapy or a combination of saidtherapies.
 9. The method according to claim 8, wherein saidchemotherapy, targeted immunotherapy or immunotherapy is selected fromtreatment with vemurafenib, dabrafenib, trametinib, cobimetinib,temozolomide, dacarbazine, paclitaxel or combinations thereof.
 10. Themethod according to claim 8, wherein said chemotherapy, targetedimmunotherapy or immunotherapy is selected from treatment withpembrolizumab, ipilmumab, nivolumab, interferon alpha, interferon alpha2b or combinations thereof.
 11. The method according to claim 1, whereinsaid subject is treated with a total of between 20 and 100 fractions ofradiation.
 12. The method according to claim 11, wherein said subject istreated with a total of between 20 and 56 fractions of radiation. 13.The method according to claim 8, wherein said subject is treated with atotal of between 20 and 100 fractions of radiation.
 14. The methodaccording to claim 13, wherein said subject is treated with a total ofbetween 20 and 56 fractions of radiation.
 15. The method according toclaim 9, wherein said subject is treated with a total of between 20 and100 fractions of radiation.
 16. The method according to claim 15,wherein said subject is treated with a total of between 20 and 56fractions of radiation.
 17. The method according to claim 10, whereinsaid subject is treated with a total of between 20 and 100 fractions ofradiation.
 18. The method according to claim 17, wherein said subject istreated with a total of between 20 and 56 fractions of radiation.